Does replace-match needs a literal TO-STRING?

Does replace-match needs a literal TO-STRING?

[Thorsten Jolitz]

Hi List, 

I try to use 
  
#+BEGIN_SRC emacs-lisp
(when (search-forward FROM-STRING nil t)
    (replace-match TO-STRING nil t))
#+END_SRC

in a temp-buffer, and it works when TO-STRING is literal like "foo", but
not when its a function that builds and then returns the string "foo". 

Is that a known restriction or am I doing something wrong?

-- 
cheers,
Thorsten

Re: Does replace-match needs a literal TO-STRING?

[Thorsten Jolitz]

Thorsten Jolitz <tjolitz@gmail.com> writes:

> Hi List, 
>
> I try to use 
>   
> #+BEGIN_SRC emacs-lisp
> (when (search-forward FROM-STRING nil t)
>     (replace-match TO-STRING nil t))
> #+END_SRC
>
> in a temp-buffer, and it works when TO-STRING is literal like "foo", but
> not when its a function that builds and then returns the string "foo". 
>
> Is that a known restriction or am I doing something wrong?

Ok, got it, I have to save-match-data before calling the string building
function (that might regexp search itself), then it works. 
Sorry for the noise.

-- 
cheers,
Thorsten